var lastHightlighedRegion = '';
function highlightRegion(region) {
    clearMap();
    jQuery('#mapOverlay').addClass(region);
    lastHightlighedRegion = region;
}

function temphighlightRegion(region) {
//    clearMap();
    jQuery('#mapOverlay').addClass(region);
//    lastHightlighedRegion = region;    
}

function clearMap() {
    if (lastHightlighedRegion != '') {
        jQuery('#mapOverlay').removeClass(lastHightlighedRegion);
        lastHightlighedRegion = '';
    }
}